Aspects of the feeding ecology of three species of &lt;i&gt;Pseudotolithus&lt;/i&gt; (Sciaenidae) in the inshore waters of southeastern Nigeria, east of the Niger Delta, Nigeria

Akpan, AW; Ia, Isangedighi

doi:10.4314/jas.v19i2.20024

Cited by 6 publications

(4 citation statements)

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“…M. cephalus is a diurnal and opportunistic feeder and feeds almost continuously throughout the day [22]. The higher feeding frequency in bigger fishes than smaller ones may be attributed to the fear of potential predators by the smaller fishes while feeding as they are more vulnerable and would rather feed more cautiously than their bigger counterpart [46]. Larger fish may require more food to obtain the necessary energy for reproductive activity than smaller ones require for growth.…”

Section: Discussionmentioning

confidence: 99%

Feeding Ecology and Prey Preference of Grey Mullet, Mugil cephalus (Linnaeus, 1758) in Extensive Brackish Water Farming System

Mondal¹,

Chakravortty²

2015

J Marine Sci Res Dev

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Feeding ecology and prey preference of Mugil cephalus reared in extensive brackish water farming system was studied based on monthly examination of stomach contents over a period of 10 months (February-November, 2014). Feeding intensity, planktonic constituents in water and food constituents in the stomach were estimated numerically. The percentage compositions of food items in the stomach falling under different groups were then compared with that of fish pond to evaluate prey preferences. Lower feeding intensity was observed during the initial months which gradually increased as the fish's grew. The dominant phytoplankton groups in pond water according to the order of dominance were Chlorophyceae, Bacillariophyceae and Myxophyceae. Most abundant zooplankton group was Dinoflagellates followed by Copepods. The main phytoplankton groups found in the stomach according to the order of dominance were Bacillarophyceae, Chlorophyceae and Myxophyceae. Dominant zooplankton group in the stomachs were Dinoflagellets followed by copepods. Prey preference analysis revealed that M. Cephalus actively selected Bacillariophyceae as most preferred food material. Myxophyceae was also selected as second preference. Chlorophyceae was not at all selected and was probably swallowed mechanically during intake of other food stuffs. True positive selection of copepods during initial months of rearing indicates preference by M. cephalus juveniles.

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Section: Discussionmentioning

confidence: 99%

Feeding Ecology and Prey Preference of Grey Mullet, Mugil cephalus (Linnaeus, 1758) in Extensive Brackish Water Farming System

Mondal¹,

Chakravortty²

2015

J Marine Sci Res Dev

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“…Being low input rearing system depending mostly on the natural productivity, such low input farming system can be considered as representative of the natural environment and co-existence of planktonic community structure resembling the natural environment is expected. Higher feeding intensity in terms of stomach fullness in bigger fi shes than smaller ones in the present study may be attributed to the fear of potential predators by the smaller fi shes while feeding as they are more vulnerable and would rather feed more cautiously than their bigger counterpart [45]. Large fi sh may require more food to obtain the necessary energy for reproductive activity than smaller ones require for growth.…”

Section: Order Of Dominance Of Planktonic Groups In the Ambientmentioning

confidence: 54%

Growth Performance, Feeding Ecology and Prey Preference of Bagrid Catfish, Mystus tengara (Hamilton, 1822) in Low Saline Polyculture Ponds of Indian Sundarbans

Mondal¹,

Sundaray²,

Bhattacharyya³

et al. 2017

Int J Aquac Fish Sci

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Growth performances, feeding ecology and prey preferences of Must us tengara (Hamilton, 1822) reared in low saline homestead traditional polyculture ponds in Sundarbans were studied for 12 months. Mixed carp early fi ngerlings (4.98±0.61 cm, 1.09±0.26 g) @ 14000 nos ha-1 and wild collected mixed bagrid catfi sh juveniles (5.09±0.48 cm, 1.38±0.11 g) including M. tengara were stocked @ 5000 juveniles ha-1. Farm yard manure @ 200 kgha-1 was applied monthly and household dining wastes (11.37±2.08 kgha-1day-1) were thrown in the ponds almost daily following traditional practice. Fishes attained 31.56±2.08 g (13.92±0.88 cm) with specifi c growth rate of 0.95±0.15 % day-1 and exponent value of Length-Weight Relationship (b=2.99) indicated isometric growth. Numeric order of dominance of prey groups in water were Chlorophyceae, Myxophyceae, Bacillariophyceae, Insect parts and larvae, Copepods, Rotifers and Cladoceran, Fish parts and larvae, unidentifi ed materials and Crustacean parts. Whereas, order of dominance of prey groups in stomach were Insect parts and larvae, Copepods, Myxophyceae, Rotifers and Cladoceran, Fish parts and larvae, Bacillariophyceae, Chlorophyceae, Crustacean parts and unidentifi ed materials. Prey electivity analysis indicated signifi cant active selection of Insect parts and larvae (E= +0.36±0.06) and Copepods (E= +0.30±0.12). Crustacean parts, Rotifers and Cladocera and Fish parts and larvae were also positively selected but were not signifi cant. This study reveals that M. tengara is a carnivorous fi sh mostly preferring Insect larvae and Copepods. M. tengara can be added in low saline polyculture ponds to improve profi tability and can be considered as a biological tool for Insect control.

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“…Higher feeding frequency in bigger fishes than smaller ones may be attributed to the fear of potential predators by the smaller fishes while feeding as they are more vulnerable and would rather feed more cautiously than their bigger counterpart [41]. In tide-fed extensive farming systems, tade mullets coexist with other herbivorous and some carnivorous fishes such as Lates calcarifer, Megalops cyprinoides, Eleutheronema tetradactylum, Therapon jarbua, Glossogobius giuris etc., which gains entry during the process of tidal water exchange and lowers production [3].…”

Section: Discussionmentioning

confidence: 99%

Feeding behavior and growth performance of tade mullet, Liza tade (Forsskail, 1775) in brackish water gher farming system

2017

IJACEBS

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Abstract-The study was conducted to appraise the growth performances, and feeding behavior of tade mullet (Liza tade) in an extensive polyculture gher-farming system. The ghers were occupied with unfiltered estuarine water (15.5 ppt), containing various types of crustacean and fish species. The water was replaced (25-30%) every cosmological cycle through bamboo screens. Tade mullet (4.35±0.80 g) stocked at 2500 fingerlings/ha were attained a mean final weight of 277.42±12.65 g. The result showed an undesirable algometric growth because of the scarcity of food resources in the extensive gher farming system. Feeding concentration in terms of stomach richness increased with increasing fish weight. The study showed that tade mullet is an herbivorous fish, grazing mainly on phytoplankton and organic matter from the bottom sediment in regards of ecological view. Although tade mullet fed on a wide variety of phytoplankton groups including Bacillariophyceae, Myxophyceae and Chlorophyceae according to the order of supremacy, they vigorously select Chlorophyceae followed by Myxophyceae and Bacillariophyceae according to order of preference indicating their ability to select favorite food items.

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Aspects of the feeding ecology of three species of <i>Pseudotolithus</i> (Sciaenidae) in the inshore waters of southeastern Nigeria, east of the Niger Delta, Nigeria

Cited by 6 publications

References 0 publications

Feeding Ecology and Prey Preference of Grey Mullet, Mugil cephalus (Linnaeus, 1758) in Extensive Brackish Water Farming System

Feeding Ecology and Prey Preference of Grey Mullet, Mugil cephalus (Linnaeus, 1758) in Extensive Brackish Water Farming System

Growth Performance, Feeding Ecology and Prey Preference of Bagrid Catfish, Mystus tengara (Hamilton, 1822) in Low Saline Polyculture Ponds of Indian Sundarbans

Feeding behavior and growth performance of tade mullet, Liza tade (Forsskail, 1775) in brackish water gher farming system

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